摘要:
Medical system comprising a hollow catheter 14, for insertion into a human or animal body, and an elongated x-ray tube unit 12 provided with an x-ray tube 16 at its distal end and adapted to be inserted into the catheter. A distal pole 8 of the x-ray tube is connectable to a connection means 22 in said catheter, wherein the x-ray tube is energised via a single electrical conductor 18 in said x-ray tube unit connected to the proximal pole and via said connection means.
摘要:
The invention relates to a sensor (23) adapted for a sensor and guide wire assembly for intravascular measurements in a living body, wherein the sensor (23) comprises a pressure sensitive part (24) and an electronic part (25), said pressure sensitive part (24) comprising a first chip (26) provided with at least one pressure sensitive device (27) and at least one piezoelectric element (35), and said electronic part (25) comprising a second chip (28) provided with at least one electric circuit, and wherein said pressure sensitive part (24) and electronic part (25) are spatially separated from each other and are electrically connected with at least one electrical lead (29).
摘要:
An X-ray source includes a first support member and a second support member joined together so as to form a cavity between them and such that they are electrically insulated from each other. A cathode and an anode are located inside the cavity and opposite each other. The cathode is suitably made of diamond or diamond like material, and includes at least one pointed element.
摘要:
A method and a system for x-ray treatment of, for example, cancer or restenosis prevention inside a living body is disclosed. A miniature x-ray tube (1) is provided with at least one pair of electrodes (6, 8), the electrodes alternatingly serving as anode and cathode, respectively. A power supply (13) is connected to the electrodes, and a switching unit of the power supply alternates the electrical potential across the electrodes. With the x-ray tube according to the invention the temperature increase at the site of treatment is limited, thereby providing an effective treatment without unduly prolonged treatment duration.
摘要:
The invention relates to a sensor (23) adapted for a sensor and guide wire assembly for intravascular measurements in a living body, wherein the sensor (23) comprises a pressure sensitive part (24) and an electronic part (25), said pressure sensitive part (24) comprising a first chip (26) provided with at least one pressure sensitive device (27) and at least one piezoelectric element (35), and said electronic part (25) comprising a second chip (28) provided with at least one electric circuit, and wherein said pressure sensitive part (24) and electronic part (25) are spatially separated from each other and are electrically connected with at least one electrical lead (29).
摘要:
The invention relates to a sensor/guide wire device for biological pressure measurements having a guide wire (16, 17, 18, 21, 23) having a distal and a proximal end, and a pressure sensor device (19) mounted at the distal end of the guide wire. The distal portion can be a solid wire member (16) surrounded by a spiral member (18), and the sensor (19) can be an electrical sensor of a piezoresistive type. The sensor (19) is mounted on the solid wire (16). The sensor is mounted in a cantilevering fashion such that a pressure sensitive end of the sensor does not contact any structure other than its mount. This prevents forces (bending artifacts) from being exerted on the sensor, which could otherwise interfere with pressure measurements.
摘要:
A multifunctional breath analyzer includes a receptor unit for receiving a breath sample from a test subject, a sensing unit providing a signal corresponding to the concentration of at least one volatile substance within the sample, elements for providing a signal indicative of the dilution of the breath sample, and an analyzing unit/processing unit for the identification and quantification of the volatile substance of the breath sample. The signal processing unit is configured to perform at least two different calculations for the quantification, and the signal processing unit is also configured to automatically display the result of a selected calculation, the selection being based on the signal indicating dilution.
摘要:
The invention relates to a sensor and guide wire assembly for intravascular measurements within a living body, wherein a sensor element, which is arranged at a distal portion of a guide wire, comprises at least one piezoresistive nanowire.
摘要:
The invention relates to a sensor and guide wire assembly including a pressure sensor having a plurality of terminals, the sensor being mounted in the distal end region of a core wire. It also includes two to four electrodes for conductance measurement, also provided in the distal end region. Two electrodes are electrically insulated from each other.
摘要:
A guide wire for measuring physiological characteristics inside a body includes a sensor (14) for monitoring the physical variable and for forming an output signal characteristic for the value of the physical variable. The sensor is connected to a first electrical potential of an electronic unit (22) via an electrical wire (11) extending along the guide wire. An internal body electrode (17) is connected to the sensor (14) and is in contact with body fluids surrounding the sensor circuit. The guide wire (10) is inserted into a vessel of the body (25), and a second electrode (21) is applied near the internal body electrode, and the sensor circuit is powered by a second potential of the electronic unit (22) via a part of the body.